Design study of a neutral beam injector for fusion DEMO plant at JAERI

Inoue, Takashi; Hanada, M.; Kashiwagi, M.; Nishio, S.; Sakamoto, K.; Satō, Masayasu; Takeuchi, Masaki; Tobita, K.; Watanabe, K.

doi:10.1016/j.fusengdes.2005.08.074

Cited by 16 publications

(5 citation statements)

References 10 publications

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“…Inoue et al [33] proposed arrays of semiconductor lasers. These have area ∼0.05 × 0.05 mm, and large divergences of 10-35 • .…”

Section: The Lasermentioning

confidence: 99%

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Laser photodetachment neutraliser for negative ion beams

Kovari

Crowley

2010

Fusion Engineering and Design

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“…Inoue et al [33] proposed arrays of semiconductor lasers. These have area ∼0.05 × 0.05 mm, and large divergences of 10-35 • .…”

Section: The Lasermentioning

confidence: 99%

“…10, which also shows the ITER layout for comparison). It is in any case desirable to structure the beam into several "beam groups", as this allows radiation shielding to be placed inside the beamline [33]. Fig.…”

Section: Layoutmentioning

confidence: 99%

Laser photodetachment neutraliser for negative ion beams

Kovari

Crowley

2010

Fusion Engineering and Design

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“…From the point of view of system efficiency, NBI should adopt electrostatic acceleration in which around 50% of system efficiency is foreseeable in 2020-2030. Based on this acceleration method, the beam energy of NBI is restricted to be lower than 2 MeV [26] and thus the beam mainly deposits in the peripheral region at standard parameters of SlimCS. In spite of such a peripheral deposition, the electrostatic acceleration is favourable compared with higher energy NBI based on RFQ acceleration in terms of system efficiency.…”

Section: Systemmentioning

confidence: 99%

SlimCS—compact low aspect ratio DEMO reactor with reduced-size central solenoid

et al. 2007

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The concept for a compact DEMO reactor named 'SlimCS' is presented. Distinctive features of the concept are low aspect ratio (A = 2.6) and use of a reduced-size centre solenoid (CS) which has the function of plasma shaping rather than poloidal flux supply. The reduced-size CS enables us to introduce a thin toroidal field coil system which contributes to reducing the weight and perhaps lessening the construction cost. Low-A has merits of vertical stability for high elongation (κ) and high normalized beta (β N ), which leads to a high power density with reasonable physics requirements. This is because high κ facilitates high n GW (because of an increase in I p ), which allows efficient use of the capacity of high β N . From an engineering aspect, low-A may ensure ease in designing blanket modules robust to electromagnetic forces acting on disruptions. Thus, a superconducting low-A tokamak reactor such as SlimCS can be a promising DEMO concept with physics and engineering advantages.

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“…Our analysis using an ACCOME code [18] on current drive efficiency (η CD ) indicates NBCD has a little advantage over ECCD in that η CD of NBCD is 10-30% larger than that of ECCD when the plasma current is driven in the central region. As to NBCD, although η CD increases up to 3 MeV, the beam energy of 1.5-2 MeV based on electrostatic acceleration is favorable from the viewpoint of the system efficiency compared with higher energy NB based on RFQ acceleration [19]. For the 1.5-2 MeV NBI, the system efficiency of around 50% is foreseen for DEMO.…”

Section: Current Drive Technologymentioning

confidence: 99%